I have a feeling that "withing reason" means that people who order in the same day (00-24 hour period) will be shipped according to chips batch number and people who ordered different days will be shipped according to order day. So if 2 people from chips batch 1 and chips batch 4 order the same day will be shipped the same day, but someone from batch 1 ordering the fifth day will be shipped the fifth day. (as long as there are enough chips for everyone, if not then chips batch number is the first)